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mac80211: fix unaligned access in mesh table hash function

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[ Upstream commit 40586e3fc400c00c11151804dcdc93f8c831c808 ]

The pointer to the last four bytes of the address is not guaranteed to be
aligned, so we need to use __get_unaligned_cpu32 here

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Fietkau 2019-03-13 18:54:27 +01:00 committed by Greg Kroah-Hartman
parent 22965240aa
commit ccc26e1f85
1 changed files with 1 additions and 1 deletions
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2
net/mac80211/mesh_pathtbl.c
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@ -23,7 +23,7 @@ static void mesh_path_free_rcu(struct mesh_table *tbl, struct mesh_path *mpath);
static u32 mesh_table_hash(const void *addr, u32 len, u32 seed) static u32 mesh_table_hash(const void *addr, u32 len, u32 seed)
{ {
/* Use last four bytes of hw addr as hash index */ /* Use last four bytes of hw addr as hash index */
return jhash_1word(*(u32 *)(addr+2), seed); return jhash_1word(__get_unaligned_cpu32((u8 *)addr + 2), seed);
} }
static const struct rhashtable_params mesh_rht_params = { static const struct rhashtable_params mesh_rht_params = {